"Luna Pro SBC" is the name used to market that meter in the USA. In the rest of the world, including Canada, it was known as the Profisix.
I have both the adapters that use the silver oxide cells (with diode) which are more expensive, but give long battery life and Jon Goodman's hearing aid battery adapters. Both types work really well.
If, like me, you like to buy and use a variety of old cameras, expect to require a few .